Microstructural characterization and amorphous phase formation in Co40Fe22Ta8B30 powders produced by mechanical alloying

► Mechanical alloying developed the amorphous phase in Co40Fe22Ta8B30 alloy. ► The powders had 96 wt% amorphous phase after 200 h milling. ► The 200 h milled powders showed the huge relaxation hump in the DSC plot. ► The mean volume lattice strain was calculated based on the Miracle's model.